[time-nuts] FW: Re: Low-Cost 6+ GHz Prescaler board for

[Bob Camp]

Hi

There are things like SMA to MCX adapters that mount in a roughly BNC sized hole. They are *not* cheap from the sources I have seen. There might be another source for them though.

Bob


On Mar 25, 2010, at 7:00 PM, Samuel DEMEULEMEESTER wrote:

> Too expensive. A solution might be to use a TNC adapter with a
> TNC(M)-to-SMA(F) adapter (see http://cpc.cx/OF). Cost only a few bucks.
> 
> 
> -----Message d'origine-----
> De : time-nuts-bounces at febo.com [mailto:time-nuts-bounces at febo.com] De la
> part de David C. Partridge
> Envoyé : jeudi 25 mars 2010 23:45
> À : 'Discussion of precise time and frequency measurement'
> Objet : Re: [time-nuts] FW: Re: Low-Cost 6+ GHz Prescaler board for
> 
> 3.5mm 
> 
> Dave
> -----Original Message-----
> From: time-nuts-bounces at febo.com [mailto:time-nuts-bounces at febo.com] On
> Behalf Of Samuel DEMEULEMEESTER
> Sent: 25 March 2010 21:02
> To: 'Discussion of precise time and frequency measurement'
> Subject: Re: [time-nuts] FW: Re: Low-Cost 6+ GHz Prescaler board for
> 
> BNC is definitely not an option. My "standard" connector for this project is
> a TNC connector. It's rated to 8 GHz and
> many adapter are available for cheap. The N connector might be an option (I
> can propose the PCB with a
> Type-N) but as you said, it will require another front panel. Keep in mind
> that Agilent is selling this front panel for
> $199 ! I think this doesn't worth that price.
> 
> 
> -----Message d'origine-----
> De : time-nuts-bounces at febo.com [mailto:time-nuts-bounces at febo.com] De la
> part de Rich Stolte Envoyé : jeudi 25 mars
> 2010 21:12 À : time-nuts at febo.com Objet : [time-nuts] FW: Re: Low-Cost 6+
> GHz Prescaler board for
> 
> N connector would be preferable if space would accomidate the cutout being
> drilled to a larger size.  If not, the front
> panel from the 5 GHZ /12 GHz counter is available from Agilent.  They did
> not use a BNC connector past 3
> GHz and I don't think you want to either.   As far as the specification
> tradeoffs, I think you should try to mirror Agilent's specs as closely as
> possible for their 5 GHz opton
> <http://www.home.agilent.com/agilent/product.jspx?cc=US&lc=eng&nid=-53690243
> 8.536907575&pageMode=OV>
> http://www.home.agilent.com/agilent/product.jspx?cc=US&lc=eng&nid=-536902438
> .536907575&pageMode=OV  Anything that does not meet Agilent's spec will
> cause calibration problems for anyone who wants
> to send it off to a commercial calibration lab unless they are given very
> specific instructions which might be hard to
> do years in the future when the specs to your board have been forgotten and
> mislaid.
> 
> Pricing would depend on a few factors, not the least of which would be your
> fixed cost, and how much work / cost are
> involved in making the front panel connector work.  I would say a range from
> $250 each to $1000 each wouldn't be
> unreasonable.  If you hit the low end of that range, I would be interested
> in talking about buying a quantity of them
> from you to resell.
> At the high end of that range, you can probably find a few buyers if you
> work hard at marketing, but definitely count me out.   
> 
> Right now, it is also hard to find option 010 oven timebase for these
> counters.  I wonder if you or someone else on this
> list has any insight about the possibility of retrofitting one of the older
> ubiquitous oven oscillators, or possibly
> even an lpro?  
> 
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